The first cellular form of life could have originated

Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.

$A$ : Tyrannosaurus rex had fearsome dagger like teeth.
$R$ : Tyrannosaurus was largest dinosaur depending upon herbs and shrubs.

Match the following columns.

Which of the following arrangement of periods of the mesozoic era gives a correct sequence from the earliest to the latest?